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The machine moves on rails in a greenhouse. It has a 3D stereo camera system to image the berries and judge which ones are ripe according to color.

When it finds one, a robotic arm reaches out and snips its stem. Into the basket it goes. It can harvest a berry every 8 seconds.

"This robot would harvest two-thirds of the strawberries during the night when growers are sleeping," Shibuya Seiki's Mitsutaka Kurita told AFP.

"The farmer can then pick the rest of the strawberries that the robot couldn't get at."

While a small basket of strawberries can fetch about $5 in Japan, harvesting them takes a lot more work than other produce such as rice, tomatoes, or cucumbers. But the machine could eventually pay for itself.

The berry-bot is the commercial version of a robot developed by Japan's National Agriculture and Food Research Organization (NARO) that we saw three years ago.

Back then, it took 9 seconds to pick a berry, so it's slightly faster now. In another 10 years, it'll be baking strawberry shortcakes in no time flat.